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OCR A GCSE Chemistry Paper 3 Higher Tier (J248 03) - 22nd May 2023 [Exam Chat]


OCR A GCSE Chemistry Paper 3 Higher Tier (J248 03) - Monday 22nd May 2023 [Exam Chat]

Welcome to the exam discussion thread for this exam. Introduce yourself! Let others know what you're aiming for in your exams, what you are struggling with in your revision or anything else.

Wishing you all the best of luck.

General Information
Date/Time: Monday 22nd May / AM
Length: 1h 45m

Resources
OCR A (Chemistry)

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Reply 1
How was the Paper ?
Does anyone remember any answers for calculations
7.2g is the only one I remember? What did u get?
Reply 3
Original post by Student16061
7.2g is the only one I remember? What did u get?

yeah i got that then there was another question with avagardos constant and 0.45 moles i think you had to divide
for the avogrados constant one i did 0.9 (moles of NO2 or whatever) x avogrados constant but thats the calculation for number of atoms so its probably wrong
what did you guys do for the sand salt and water
Original post by nyxonline
for the avogrados constant one i did 0.9 (moles of NO2 or whatever) x avogrados constant but thats the calculation for number of atoms so its probably wrong


I did the same thing but idk if it’s right
Reply 7
was expecting it to be difficult but it actually went semi good (reckon I can get a 6/7)
(edited 1 year ago)
Reply 8
Original post by nyxonline
what did you guys do for the sand salt and water

I put distillation but my grade 9 friend told me you had to put filitration then distillation
Reply 9
i swear the polymer and crosslinks are part of paper 2
Reply 10
Original post by abizz
I put distillation but my grade 9 friend told me you had to put filitration then distillation


distillation is for separating multiple liquids while filtration is separating an insoluble solid (hasn't dissolved) from a liquid. also im pretty sure u had to talk about how to test if its pure afterwards (u boil it and if the boiling point is exactly the same its pure)
(edited 1 year ago)
Original post by Student16061
I did the same thing but idk if it’s right

thank god bc it’s the only thing i could think of😭😭
Original post by Student16061
7.2g is the only one I remember? What did u get?

oh no i put 14.4 instead because i forgot to divide by 2 nooooo :s-smilie:
Original post by Ujaval
i swear the polymer and crosslinks are part of paper 2


me when i saw the word hexane in the multiple choice questions i was sooo.... :confused:
what did you get for the avogadros constant 3 marker?
Original post by Manutdfan221
what did you get for the avogadros constant 3 marker?

i did 0.9 mol x avogrados constant so i got 5.42 x 10^23 but dk if that’s right
Congratulations everyone :smile:
what did u all include in your 6 markers
Original post by nyxonline
i did 0.9 mol x avogrados constant so i got 5.42 x 10^23 but dk if that’s right


Same it’s right
Original post by Ujaval
distillation is for separating multiple liquids while filtration is separating an insoluble solid (hasn't dissolved) from a liquid. also im pretty sure u had to talk about how to test if its pure afterwards (u boil it and if the boiling point is exactly the same its pure)


You talk about filtration of sand then distil and crystallisation I swr

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